Microsoft is downplaying antitrust concerns over its recent purchase of Activision Blizzard. With many worried that'll create a monopoly - having already purchased Bethesda and other studios - Microsoft unsurprisingly believes things will remain fair for their competitors.
Speaking to Financial Times for an interview, Satya Nadella, Microsoft CEO, feels the company shouldn’t face many obstacles when it comes to acquiring Activision Blizzard. Instead, he believes they'll still be “number three” in gaming's overall market share.
Microsoft Attempts to Downplay Antitrust Concerns Regarding Activision Blizzard Purchase
Specifically, Nadella's advised:

Despite Nadella’s comments, many are still worried about the recent acquisition war, after Sony purchased Destiny developers Bungie. Elsewhere, Nintendo has stated they won't be making any major studio purchases at this time, and we'll keep you updated if anything changes.